Tito Ortiz -- No Charges Will Be Filed

5/13/2010 12:25 PM PDT

Tito Ortiz -- No Charges Will Be Filed

TMZ has learned ... the Orange County District Attorney has rejected the case against Tito Ortiz, who was arrested last month for felony domestic violence.

The D.A. tells TMZ there was insufficient corroboration to prove beyond reasonable doubt that Tito had attacked his girlfriend Jenna Jameson. That could have something to do with the fact Jenna changed her story multiple times.